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1、1.人们认为淡水是取之不尽的（提示：雨水，河水，井水） 2.实际上淡水是短缺的（提示：人口增加，工业用水增加，污染严重） 3.我们应当怎么办（提示：节约用水，开发新水源）GlobalShortageofFreshWater Peopleoftenthinkthatwaterwillneverbeusedup.Thereisplentyofwater,suchasrain,waterfromtheriversandwells.Itseemsasifwaterisalwaysavailable
2、aroundusandweneverhavetoworryaboutwatershortage. Infactwaterisratherlimitedontheearth.Withtherapidincreaseofpopulationandfastdevelopmentofindustries,waterismoreneededthanbefore.Atthesametime,alargeamountofwaterhasbeenpollutedandwastedeveryday.Somebi
3、gcitiesinChinaarefacingtheproblemofwatershortagealready.There,watersupplyiscontrolledandindustryhasbeenrestrained.Whatshouldwedoaboutthewatershortage?Ithink,first,thepeopleshouldbemadeawareoftherealsituationaboutthewater.Everyoneshouldconsciouslysave
4、onwaterandcertainlawshouldbemadethatnowaterwillbepolluted.Wehavetoprotecttheexistingwaterresourcesanddevelopnewones.InthiswayIbelievethatourcitieswillnotbethirstyforwaterinthefuture.1.快餐在中国十分流行，它是现代快节奏社会的最佳反映。2.快餐受欢迎有几条原因3.然而，从营养角度来讲，快餐却差强人意。对快餐还是以偶尔
5、品尝为宜。FastFood FastfoodisbecomingmorepopularinChina,especiallyamongchildrenandteenagers.Today,it'scertainlydifficulttothinkofanyothersinglethingthatrepresentsthefastpaceofmodernsocietyaspowerfullyasfastfood. Thereareseveralreasonsforitspopularity.Fi
6、rst,itisveryconvenientandsavesalotoftime.Thetrendsofmodernsocietyseemtoallpointtooneultimategoal——savingtime,andfastfoodwellservesthispurpose.Youjustgointoafastfoodrestaurant,orderyourfood,andyourfoodisreadyinnotime.Youcaneithereatitthereortakeitaway
7、.Second,itspopularityisalsoattributedtothecleanandcomfortableenvironmentoffastfoodrestaurants,theexcellentservice,andtheguaranteedqualityoffood. However,intermsofnutrition,fastfoodisfarfromsatisfactory.Itusuallydoesnotcomposeabalanceddietandislowinn
8、utritionalvalue.Thus,doctorssuggestthatpeople,especiallychildren,eatfastfoodaslittleaspossible. Althoughcookingathomeistime—consumingandthefollowingwashing-uptiresome,itoffershealthyanddeliciousmealsyourbodylikesandneeds.Fastfoodisonlyagoodchoicewhe
